Variable-speed driving mechanism.



H. G. SGHROEDER. VARIABLE SPEED DRIVING MECHANISM.

APPLICATION FILED JAN. 14, 1909.

Patented Nov. 16. 1909.

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' APPLICATION FILED JAN.14, 1909.

Patented Nov. 16, 1909.

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H. G. SGHROEDER. VARIABLE SPEED. DRIVING MECHANISM.

. APPLICATION FILED JAN. 14, 1909. Patnted N'OVl 16' U 3 SHEETSSHEBT 3.

' UNITED STATES PATENT OFFICE.

HANS C. SCHROEDER, OF GHICAGO, ILLINOIS, ASSIGNOR TO THE GOSS PRINTINGPRESS COMPANY, OF CHICAGO, ILLINOIS,'.A CORPORATION OF ILLINOIS.

VARIABLE-SPEED DRIVING MECHANISM.

Specification of Letters Patent.

Patented Nov. 16, 1909.

To all whom it may concern:

Be it known that I, HANS C. SCHROEDER, a subject of the German Emperor,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Variable- Speed DrivingMechanism, of which the following is a specification, reference beinghad to the accompanying drawings.

My invention relates to variable speed drivlng mechanism particularlyadapted for the driving of printing presses, and its object is toproduce a new and improved driving mechanism which, driven by a suitablesource of power-preferably a high speed motor operating at a constantspeed-may be readily and easily shifted so as to drive the press at aslow speed or high speed rate, and particularly to produce such adriving mech'- anism as will permit the high speed to be thrown inbefore the slow speed is thrown.

off so that there may not lapse an intervalduring the passing from oneto the other during which the press, running only upon its momentum,would be likely to slow down, causing a sudden jerk upon the throwing inof the positive drive and cansing the breakage of webs.

In the draw1ngs,Figure 1 is a top or plan view; Fig. 2 is an end view,showing a portion of the side frame of a press and severalof the drivinggears in dotted lines; Fig. 3 is a detail, being a section on line 3-3of Fig. 1, showing a side elevation of one of the clutch members, thefriction drive therefor and the brake; Fig. 4 is an enlarged detail,being a section on line 14 of Fig. 1; Fig. 5 is an enlarged detail,being a section on line 5-5 of Fig. 4; Fi 6 is an enlarged detail, beinga section on ine 6-6 of Fig. 5; and Fig. 7 is a detail, showing one ofthe eccentrics for shifting the movable shaft.

Referring to the drawings,8 indicates a bed-plate, and 9-10 indicateportions of the side frame upon which the base of the "side frame 12(seen in dotted lines in Fig. 2)

of the press is mounted, and which serve to support some of the partshereinafter described.

-13 indicates a driving shaft, which is journaled in suitable bearings,as 14, on the bedplate 8, and is driven by a driving pinion 15 securedto the outer end of the driving shaft 13 and driven from any suitablesource of power, as from a high-speed motor.

16 ndicates a ratchetwheel, which is keyed, or otherwise secured, to theshaft 13.

17 indicates a pinion, which is loosely mounted on the shaft 13.

18 indicates a drum, which is secured in any suitable manner to the hubof the pinion 17 so as to rotate therewith.

19 indicates pawls, which are carried von the outer surface of the drum18 and are adapted to be engaged by the teeth ofthe ratchet-wheel 16when it rotates in the direction indicated by an arrow in Fig. 3.

20 indicates a car, which is keyed, or otherwise secured, o a shaft 21and adapted to mesh with and be engaged by the pinion 17. The shaft 21is journaled in eccentrics 22-23, which are journaled in suitablebearings 21-25 on the bed-plate 8. The eccentr1cs2223 are provided,respectively, with arms 2627, preferably integral therewith, and soplaced upon the eccentrics 2223 that when the shaft 21 is in positionthe arms come respectively between the bearings 24: and bearings 25. Itwill be obvious that when the arms 26-27 are rocked in the mannerhereinafter described the eccentricsv 22-23 will be rotated andstheshaft 21 thereby will be moved slightly toward and away from the shaft13. p

28 indicates a friction ulley, which is keyed, or otherwise secured? tothe shaft 21 and is preferably provided with a number -ofcircumferential ridges 29 which engage circumferential rid es 30 on aclutch-drum 31 which is keye or otherwise rigidly mounted, upon the hub32 of a driving pin":

ion 33,the hub 32 being loosely mounted on the shaft 13. The clutch-drum31 is provided with a clutch-flange 34 whose inner iurface is beveled toform one clutch mem- 35 indicates a clutch-member, which is togetherthey may engage one another tightly. The hub of the clutch-member 35 isprovided with a circumferential groove 36. 37 indicates a shiftinglever, which is pivotally mounted on the framework, and one end of whichis provided with a fork 38 which embraces the hub of the clutch-member35 and is provided with rollers 39 which en age the peripheral groove36. The other en of the shifting lever is provided with a fork 40 whichstraddles a shifting-bar 41 slidingly mounted in suitable supports, as42, on the base of the machine.

43-44 indicate collars, which are pinned,

ver 27.

It will be obvious that by the shifting of i the rod 41 in the mannerhereinafter described, the shifting lever 37 may be moved so as to slidethe clutch-member 35 on the shaft 13 and move it into or out ofengagement with the clutch-drum 31.' If'the clutch members 35 and 31 arenot in engagement with each other and the shaft 21 is shifted so as tobring the friction pulley into tight engagement with' the clutch-drum31, shaft 13 on being'rotated in the direction shown by arrows in Fig. 2will carry around with it the ratchet 16 whose ratchet teeth engagingthe pawls 19 will drive the drum 18, dI'lVlDg the pinion 17, the largergear 20 and the shaft 21. The forced frictional engagement between thefriction pulley 28 on the shaft 21 and the clutch-drum 31 will cause theclutch-drum 31 to rotate carrying slower than the speed of the shaft 13,which relative amount of speed will be determined by the differencebetween the pinion 17 and 45 the gear 20 and the difference in diametersbetween the friction pulley 28 and the clutch drum 31, The drivingP1111011 33 being thus driven, the motion is communicated to the pressby means of gearing 47-4849 50-51, shown indotted lines on Fig. 2, inwhich 4748 represent intermediate gears and 4950-51 sundry of the gearsof the press. On the other hand, if the shaft'21 is moved outward fromthe shaft 13 by the rocking of the arm 26 above described so as to moveit slightly but suificiently to free the friction ulley 28 andclutch-drum 31 from frictiona engagement with each other, and if theclutch-member 35 'is slid into en agement with the clutch-flange 34, theshaft 13, driving the clutch-member 35, will drive the clutch-member 31and conse uently the pinion 33 at the same speed as t e shaft 13 and inthe same direction driving the press at high speed. The shifting of theparts is accomplished' by the mechanism hereinafter described, a greaterpart of which, however, forms. no part by itself of my presentinvention. t

52 indicates a rock-shaft, which is journaled in suitable hearings inthe frame bars 9-10.

54 indicates a lever, which is loosely mounted on the rock-shaft 52 nearits outer end and is provided at its upper end with the usual latch 55which engages a suitable number of notches in a rack-bar 56. As shown,

for high speed and marked H, a notch for slow speed marked S anda notchat which the drive is thrown out and the brake thrown on marked 0.

57 indicates a disk, which is keyed, or otherwise secured, upon theouter end of the shaft 52 which is outside of and adjacent to thesurface of the lever 54. This disk 57 is provided with two sets ofratchet-teeth 58 and 59 upon opposite portions of its periphery. 7

60 indicates a rock pin, which is journaled in the lever 54 and carriesupon one side of the lever a dog 61 which is adapted to engage with heratchet-teeth 58 and upon the other side of the lever an arm 62projecting outward from the rock-shaft in a direction opposite to thatof the dog 61.

63 indicates a pin mounted in the framebar 10, which is adapted as thelever is rocked into fast osition to engage the arm 62 and lift the dog61 out of the ratchetteeth 58, as best shown in Fig. 6.

64 indicates a pawl, which is mounted upon the lower arm of the lever 54below the disk 57 and is adapted to engage the ratchetteeth 59, ashereinafter described.

65 indicates a cam, which is secured upon the lower arm of the lever 54and which is adapted as the upper part of the lever swings to the leftto engage and swing out from its normally vertical position a swlngingarm 66 which is pivotall connected at its upper end with and depen sdownward from suitable lugs 67 secured to the under side of the sideframe-bar 10. The arm 66 is provided with a latch 68. I

69 indicates a collar, which is securedto the rock-shaft 52 and whichcarries a prothese notches are three in number, a notch jecting arm'70which, when the arm 70 is swung up by the rocking of the rock-shaft 52into slow-s eed position, as hereinafter described, is ad slpted to beenga edand to be held against backward rotation y the swinging under itof the latch 68 on the swinging arm 66 when the same freed from the cam65 swings into normal vertical position.

- 71 indicates a collar, which is secured to the rock-shaft 52 and isprovided with an upward-projecting arm 72. I

73 indicates a rod, which is pivotally connected at one end to the upperend of the' tional engagement with the clutch 31 or to sliding of therod 73 longitudinally of itself.

therein.

7 5 indicates a collar, which is fixed upon the rod 73. 1

76 indicates a spiral spring, which, hearing against the lug 74 andcollar 75, tends to force the rod 73 to the right in Fig. 4 and to rockin a clockwise direction the collar 71 and therefore the rock-shaft 52when allowed freedom of action, as hereinafter described.

77 indicates a collar, which is secured to the end of the rock-shaft 52opposite the lever 54 and carries an arm 78 preferably integraltherewith. I

79 indicates a rock-shaft, which is journaled in suitable bearings, as'80, in the bedplate 8', and is provided at one end below the collar 7 7with an arm 81 suitably secured thereto.

82 indicates a link, which is pivotally connected at one end with thearm 78 on-the collar 77 and at the other end to the end of the arm 81 onthe rock-shaft 79 whereby,

when the rock-shaft 52 is rocked in one direction or the other, therock-shaft 79 will be correspondingly rocked. f 3

83 indicates an arm,.which is suitably secured to the other end of therock-shaft 79 and is connected by a link 84 with the arm 26. Another armon the rock-shaft 79 and at its other end, (like the arm 83, but notshown, it being behind the other parts on the drawings), is simplyconnected by a link 85 to the arm 27 onthe collar 23.

Itwill be obvious from the above that when the rock-shaft 52 is rockedthe rock- 'shaft 79 will be correspondingly rocked and the shaft 13 aslight distance but suflicient to bring the friction pulley into tightfricmove it out of such frictional engagement.

This motion should not be suflicient to en-- tirel-y free the gear 20from the pinion 17, it being preferable that 'said gears should remainin engagement in order to facilitate case and sureness of operation inthe manner hereinafter described. I

86 indicates a collar keyed, or'otherwise secured, to the shaft 52 andprovided with an arm 87 which carries a pawl 88.

89 indicates a collar, which is loosely mounted upon the rock-shaft 52adjacent to the collar 86 a'ndis provided upon its upper surface with 9.lug 90 adapted to be engaged by the pawl 88, so that when the rock-shaft52 is rotated clockwise, as hereinafter described, the pawl 88 may at a.suitable time engage the lug 90 and rock the collar 89 in the samedirection. The collar 89 is provided also with an arm' 91, preferablyintegral therewith.

' 92 indicates a rod, which is pivotally connected at one end with thearm 91 and at crossbar 9, is interposed aspiral sprin 94 which tends tonormally rock the collar 89 ina contra-cloclnvise direction andyieldingly maintain it in the position shown in the figures, especiallyFig. '2.

95 indicates a link, which is 'pivotally connee-ted atits upper end withthe arm 91.

and at its lower end with an arm 96 secured to one end of a rock-shaft97 which is tion or the other with the rocking ofthe collar 89 on theshaft 52.

98 indicates an arm secured to and depending downward from therock-shaft 9T opposite the ,flange 34 "of the clutch-member 31.

99 indicates a flexible brake-band, one end of which is adjustablysecured in the arm 98 and the other end is secured in the collar 100 onwhich the arm 98 is carried.

by the arm 98, as hereinafter described.

102 indicates a link, one end of which is pivotally connected with thelower end of the lever arm 54 and the other end with the lower end of aswinging lever 103 which is journaled in suitable hearings in hangers104 which aresecured to and depend downward from the side frame-bar 10.The upper arm of the lever 103 carries a beveled rack-segment 105 whichmeshes with a beveled gear 106 secured near the upper end of a shaft 107journaled in the hangers 104.

108 indicates a collar, which is secured to the lower end of the shaft107 and carries an .arm 109 preferably formed integral therewith.

pivotally connected with the arm 109 and -the other end with one end ofthe shift-bar 41. When the lever 54 isrocked, the beveled the other inltSbeMiHgS-i longitudinall' of itself in one direction or...

The 0 eration 'ofthe device is as follows: i

In' the rawin high-speed p0s1tion,t hat isx't'osay with {beg-1 30 l sthe parts are shown inthe of the beveled rack-segment 105 with thebeveled gear 106 will rock the shaft 107, pull the link 110 in adirection toward the upper portion of the drawing in Fig. 1, pulling theshift-bar 41 in the same direction, and

by the bringing of the collar 43 into con-\ tact with the end of theshifting lever 37 will slide the clutch-member 35 out of engagement withthe clutch-member 31. As

' this movement to the right continues, the

movement of the lever continues.

arm 62 on the rock-pin 60 is freed from en-- gagement with the pin 63,allowing the dog 61 to drop upon the periphery of the disk 57, passingover the ratchet-teeth 58 as the Tiis same movement of the lever swingsthe cam 65 out of engagement with the swinging arm 66, allowin it todrop free from engagementwith t e cam but not falling under the arm 70until that is lifted so as to permit its enga ement, as hereinafterdescribed. As the lever 54 nears the oflI-fnotch O- the pawl 64 engagesone of the ratchetteeth 59 and turning the wheel 5'7-. .rocks the shaft52 in a clockwise direction. Just be- I fore the lever reaches the offnotch the pawl 88 on the arm 87 on the collar 86-whi.ch collar -is beingrotated clockwise by the rocking of the shaft 52en ages thelug 90 on thecollar .89 and roc s it clockwise against the action of the spring 94.This moving the arm 89 also in a clockwise direction moves the link 95from left to right in Figs. 1 and 2 and rocking the shaft- 97 tightensthe flexible brake-band upon the brake and binds the same to the flange34 of the clutch-drum 31, breaking the press and bringing it to a stop.

When it is desired to start the press, the hand-lever 54 is moved to theleft. This causes the engagement of the dog 61 with one of theratchet-teeth 58 on the disk 57,

tion.

toward the shaft 13, bringing the friction pulley 28 into tightengagement with the clutch-drum 31 causing its rotation and theconsequent rotation of the inion 33 at slow speed, as above described.his same motion of the rock-shaft 52 has lifted the lug -70 on theswinging arm 66which up to. this point is free from the cam to dro underthe arm 70 and thus hold the roc -shaft, which has been rocked againstthe action of the spring 76, against return movement until free to move,as hereinafter described. The swinging of the lever 54 in this directionhas also through the arm 103 and beveled rack-segment 105'rotated theear 106, the shaft 107 and-moved the shi t-bar 41 until the collar 45has been brought into contact with the end of the shifting-lever 37ready to move the shifting-lever upon further movement of the lever 54to bring thu clutch-members into engagement. The lever 54 has not yetbeen brought into position to cause the in 63 to en age the arm 62 androck the og 61 outo? engagement with the ratchet-teeth 58. This samerocking of the shaft 52 has, of course, rocked the collar 86 in thesame. direction and freed the lug 90 on the collar 89, from the pawl 88.

thereupon immediately rocks the collar89 contra-clockwise, releasing thebrake from the clutch-member as soon as the movement of the lever inthis direction has started. The lever therefore being in the slow-speedposition, the brake is off, the clutch-members 31 {and 35 not yetbrought into engagement and the press is running at slow speed. It beingdesired to thereupon drive the press at high speed, the lever 54'ismoved toward the high-speed position. The first movement of the lever inthis direction shifts the shiftbar 41 soas to throw the shifting-lever37 and bring the clutch members 31 and 35 into engagement with oneanother, which engagement, it will be obvious, will be radual and notsudden on account of the eveled bearing surfaces above described,afurther yielding being permitted by a spring 46.

gins be ore the disengagement of the fricing up the more rapid movementwill, of course, cause a momentar highly accelerated speed of the shaft21an therefore, through the gears 20 and 17, cause'a correspondingacceleration of the drum 18,this movement,however, being permitted bythe slippin 4 of the pawls over the ratchet-wheel 16. It ollows that thelow-speed mechanism is not disengaged until after the high speed "towardthe higher speed, preventing as has been. said above, the lapse of amoment oftime during which the press would be running by its ownmomentum. As the higher speed begins to taken up, the 'pin on the collar69, permitting the latch 68 This en agement of the clutch-members betion-pulley 28, and the clutch-drum 31tak begins to engage and the pressbegins to run This leaves the spring 94 free to act, which 63 engagesthe arm 62 and lifts the pawl 61 out of engagement with the teeth 58. Atabout the same time the cam 65 is brought into engagement with theswinging arm 66, swinging it to one side and freeing the latch 68,leaving the rock-shaft 52 free from engagement both of the pawl 61 withthe disk 57 and of the latch 68 with the arm 70. The

7 spring 76 thereupon left free to .act immediately rocks the arm 72 androcking the rock-shaft 52 clockwise brings the parts into the positionshown in the several figures. This rocking of the rock-shaft by thespring '76 by the operation of the arm 7 8, link 82,

and arms 81 rocks the rock-shaft 79, rocking, as has been abovedescribedbut in the opposite direction, the eccentric collars 22 on the shaft 21and moving the said shaft away from the shaft 13 sufiicient to free thefriction wheel 28 from frictional engagement with the clutch-member 31,allowing the parts which have been momentarily accelerated to slow downto normal speed. The further movement of the lever to the fullspeedposition forces the clutch-members 31 driving-shaft, adriving-pinionconnected to said clutch-member, a sec ndsclutch-memberslidingly mounted on said drivingshaft, and means for moving saidclutch-members into and out of engagement, of a pinion rotatably mountedon said driving-shaft, means for rotating said pinion in one directionfrom said--driving-shaft, a countershaft, a gear on said counter-shaftof larger size than said 'pinioii'and meshing therewith, a frictiondevice on said counter-shaft adapted to frictionally engage theperiphery of said first clutch-member, and means for shifting saidcounter-shaft toward and from said drivin -shaft and causing frictionalengagement etween said counter-shaft and said first clutch-member.

2. The combination with a driving-shaft, a gear rotatably mounted 011said drivingshaft, a clutch -member fixedly connected with said gear,and a second clutch-member slidingly mounted on said driving-shaft andadapted to be brought into engagement with said loose clutch-member anddrive the same, of a 1pinion rotatably mounted on said driving-s aft,pawl and ratchet connections between said driving-shaft and said inion,a counter-shaft adapted to be move toward and away from saiddriving-shaft, a large gear on said counter-shaft meshing with saidpinion, a friction member on said counter-shaft adapted when saidcounter-shaft is moved toward said driving-shaft to frictionally engagesaid loose clutch-member, means for moving said clutch-members into andslidingly mounted on said driving-shaft and adapted to be brought intoengagement with said loose clutch-member and drive the same,

of a pinion rotatably mounted on said driving shaft, pawl and ratchetconnections between said driving-shaft and said pinion, a counter-shaftadapted to be moved toward and away from said driving-shaft, a largegear on said counter-shaftmeshing with said pinion, a friction member onsaid countershaft adapted when said counter-shaft is moved toward-saiddriving-shaft to frictionally engage said loose clutch-member, a clutchshifting device for moving said clutch-member into and out ofengagement, a hand-lever, connections between said handlever and saidclutch shifting device, means operated by said lever for shifting saidcounter-shaft toward and away from said driving-shaft, said lever andits connecting devices being adapted when said lever is moved in onedirection to first move said counter-shaft toward said driving-shaft andbring said friction device into friction engagement with said looseclutch-member, then, as said lever is moved farther in the samedirection, to operate said clutch-moving means to cause engagement ofsaid clutch members and, as said clutch-members are brought intoengagement to shift said counter-shaft away from said drivin -shaft.

4. The combination with a driving-shaft, a gear rotatably mounted onsaid drivingshaft, a clutch-member fixedly connected with said gear, anda second clutch-member slidingly mounted on said driving-shaft andadapted to be brought into engagement with said loose clutch-member anddrive the same, of a pinion rotatably mounted on said driving-s aft,pawl and ratchet connections between said driving-shaft and said inion,a counter-shaft adapted to be moved toward and away from saiddriving-shaft, a large gear on said counter-shaft meshing with saidpinion, a friction member on said countershaft adapted when saidcounter-shaft is moved toward said drivin -shaft to frictionally engagesaid loose clutc -member, a clutch shifting device for moving saidclutch members into and out of engagement, a brake, a hand-lever,connectionsbetween said hand lever and said clutch-shiftin device, meansoperated by said lever for shi ting said counfer-shaft toward and awayfrom said driving-shaft, said lever and its connections bethe oppositedirection to move said clutchmembers out of engagement.

5. The combination with a driving-shaft, a gear rotatably mounted onsaid drivingshaft, aclutch-member fixedly connected with said gear, anda second clutch-member slidingly mounted on said driving-shaft andadapted to be brought into engagement with said loose clutch-member anddrive the same, of a pinion rotatably mounted on said driving shaft,pawl and ratchet connections between said drivin'g-shaft and saidpinion, a counter-shaft adapted to be moved toward and awayfrom saiddriving-shaft, a large gear on said-counter-shaft meshing with saidpinion, a friction member on said counter-shaft adapted when saidcounter-shaft is moved toward said driving-shaft to frictionally engagesaid loose clutch-member, a clutch shifter for moving saidclutch-members into and out of engagement, a brake adapted to be appliedto said loose clutchmember, a hand-lever, connections between saidhand-lever and said clutch-shifter, connections operated by said leverfor shifting said counter-shaft toward and away from said driving-shaft,and connections between said lever and said counter-shaft and betweensaid lever and said brake, said lever and its connections being adaptedwhen said lever is moved in one direction to first move saidcounter-shaft toward said drivin -shaft and bring said friction deviceinto friction engagement with said loose clutch-member, then, as saidlever is moved farther in the same direction, to operate saidclutch-moving means to throw said clutch members into engagement, and,as said clutch-members are brought into engagement, to shift saidcounter-shaft away from said driving-shaft, said connections being alsoadapted, as said lever is swung in the opposite direction, to move saidclutch-members out of engagement, and, as'said lever is moved to thelimit of its motion in the backward direction, to clamp said brake uponsaid loose clutch-member.

HANS o. SCHROEDER.

